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parasynpathetic system
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Does the gray rami communicans contain fibers of a preganglionic or postganglionic neurons?
could be preganglionic
Which division of the autonomic nervous system is characterized by short preganglionic and long postganglionic fibers?
The parasympathetic nervous system has long preganglionic and short postganglionic fibers
The parasympathetic nervous system is characterized by peripheral ganglia is usually near?
organs and by short postganglionic fibers
Can a myelinated axon have a larger diameter than an unmyelinated axon?
Unmyelinated fibers typically have smaller diameters than myelinated fibers.
What does non myelinated fibers look like?
Myelinated fibers appear white in comparison to unmyelinated fibers.
What releases catecholamines as a neurotransmitter?
it would be postganglionic sympathetic fibers
What is innervated by postganglionic fibers arising from the cervical ganglia?
the eyes
Postganglionic axons secrete acetylcholine cholinergic fibers?
Parasympathetic
Do unmyelinated fibers transmit slowly?
Yes, myelinated axons are much more effective.
What is the difference in transmission between myelinated and unmyelinated fibers?
Impulse transmission on an unmyelinated nerve fiber is much slower than the impulse transmission on a myelinated nerve fiber.
Do myelinated nerve fibers conduct signals faster than unmyelinated fibers?
Yes, unmyelinated axons, action potentials are generated at sites immediately adjacent to each other and conduction is relatively slow. Degree of myelination speeds up transmission.
What substance slows the message passing from the brain to the rest of the body?
Unmyelinated nerve fibers are slower than myelinated nerve fibers. The fibers covered by myelin are much faster.
